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Tsang KY, Fantini M, Mavroukakis SA, Zaki A, Annunziata CM, Arlen PM. Development and Characterization of an Anti-Cancer Monoclonal Antibody for Treatment of Human Carcinomas. Cancers (Basel) 2022; 14:cancers14133037. [PMID: 35804808 PMCID: PMC9264992 DOI: 10.3390/cancers14133037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/14/2022] [Accepted: 06/17/2022] [Indexed: 11/16/2022] Open
Abstract
NEO-201 is an IgG1 humanized monoclonal antibody (mAb) that binds to tumor-associated variants of carcinoembryonic antigen-related cell adhesion molecule (CEACAM)-5 and CEACAM-6. NEO-201 reacts to colon, ovarian, pancreatic, non-small cell lung, head and neck, cervical, uterine and breast cancers, but is not reactive against most normal tissues. NEO-201 can kill tumor cells via antibody-dependent cell-mediated cytotoxicity (ADCC) and complement dependent cytotoxicity (CDC) to directly kill tumor cells expressing its target. We explored indirect mechanisms of its action that may enhance immune tumor killing. NEO-201 can block the interaction between CEACAM-5 expressed on tumor cells and CEACAM-1 expressed on natural killer (NK) cells to reverse CEACAM-1-dependent inhibition of NK cytotoxicity. Previous studies have demonstrated safety/tolerability in non-human primates, and in a first in human phase 1 clinical trial at the National Cancer Institute (NCI). In addition, preclinical studies have demonstrated that NEO-201 can bind to human regulatory T (Treg) cells. The specificity of NEO-201 in recognizing suppressive Treg cells provides the basis for combination cancer immunotherapy with checkpoint inhibitors targeting the PD-1/PD-L1 pathway.
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Affiliation(s)
- Kwong yok Tsang
- Precision Biologics, Inc., Bethesda, MD 20814, USA; (M.F.); (S.A.M.); (A.Z.); (P.M.A.)
- Correspondence: ; Tel.: +1-301-500-8646
| | - Massimo Fantini
- Precision Biologics, Inc., Bethesda, MD 20814, USA; (M.F.); (S.A.M.); (A.Z.); (P.M.A.)
| | - Sharon A. Mavroukakis
- Precision Biologics, Inc., Bethesda, MD 20814, USA; (M.F.); (S.A.M.); (A.Z.); (P.M.A.)
| | - Anjum Zaki
- Precision Biologics, Inc., Bethesda, MD 20814, USA; (M.F.); (S.A.M.); (A.Z.); (P.M.A.)
| | - Christina M. Annunziata
- Women’s Malignancy Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA;
| | - Philip M. Arlen
- Precision Biologics, Inc., Bethesda, MD 20814, USA; (M.F.); (S.A.M.); (A.Z.); (P.M.A.)
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